Mix salt, sugar, water, and yeast. Set aside for 5 minutes.
Add flour and mix.
Let the mixture rise for approximately 1-2 hours.
In a large saucepan, pour vegetable oil into a pot until it's at least 3 inches (about 5cm) deep and heat on low. Too little oil will result in flatter balls.
Test to make sure the oil is hot enough by putting a drop of batter into the oil. If it is not hot enough, the batter stays at the pot's bottom rather than rising to the top.
When the oil is hot enough, grab a little bit of the mixture with your hands or use a spoon to get a small ball of dough. Drop it carefully into the oil.
Fry for a few minutes until the bottom side is golden brown.
Turn the ball over and fry for a few more minutes until the other side is golden brown.
Use a large spoon or something like that to take it out of the oil. I usually place them on napkins immediately to soak up the excess oil.
If desired, you can roll the finished product in table sugar or powdered sugar to make it sweeter.